There are a tier of states that will experience an ice storm. There is only one thing important and that is the ability to say “I survived it.” It is a challenge many in the USA is not focused on.
Keeping warm does not mean building fires inside iced over buildings. It uses up the oxygen. Being warm with heaters set at modest temperatures and warm clothing with sleeping bags and blankets. Keep an entrance and exit way open with frequent shoveling and vigilance.
Stay warm.